(chore) set min version of cmake in native CmakeLists.txt to surpass Cmake CMP0000 policy warning

src/native/libs/System.Globalization.Native/CMakeLists.txt

@@ -1,3 +1,5 @@
+cmake_minimum_required(VERSION 3.20)
+
 project(System.Globalization.Native C)
 
 if(CLR_CMAKE_TARGET_UNIX OR CLR_CMAKE_TARGET_WASI)

src/native/libs/System.IO.Compression.Native/CMakeLists.txt

@@ -1,3 +1,5 @@
+cmake_minimum_required(VERSION 3.20)
+
 project(System.IO.Compression.Native C)
 
 include(${CMAKE_CURRENT_LIST_DIR}/extra_libs.cmake)

src/native/libs/System.IO.Ports.Native/CMakeLists.txt

@@ -1,3 +1,5 @@
+cmake_minimum_required(VERSION 3.20)
+
 project(System.IO.Ports.Native C)
 
 set(PORTS_SOURCES

src/native/libs/System.Native/CMakeLists.txt

@@ -1,3 +1,5 @@
+cmake_minimum_required(VERSION 3.20)
+
 project(System.Native C)
 
 if (NOT CLR_CMAKE_TARGET_MACCATALYST AND NOT CLR_CMAKE_TARGET_IOS AND NOT CLR_CMAKE_TARGET_TVOS AND NOT CLR_CMAKE_TARGET_WASI)

src/native/libs/System.Net.Security.Native/CMakeLists.txt

@@ -1,3 +1,5 @@
+cmake_minimum_required(VERSION 3.20)
+
 project(System.Net.Security.Native C)
 
 add_compile_options(-Wno-incompatible-pointer-types-discards-qualifiers)

src/native/libs/System.Security.Cryptography.Native.Android/CMakeLists.txt

@@ -1,3 +1,5 @@
+cmake_minimum_required(VERSION 3.20)
+
 project(System.Security.Cryptography.Native.Android C)
 
 add_compile_options(-Wno-gnu-zero-variadic-macro-arguments)

src/native/libs/System.Security.Cryptography.Native.Apple/CMakeLists.txt

@@ -1,3 +1,5 @@
+cmake_minimum_required(VERSION 3.20)
+
 project(System.Security.Cryptography.Native.Apple C)
 
 include(${CMAKE_CURRENT_LIST_DIR}/extra_libs.cmake)

src/native/libs/System.Security.Cryptography.Native/CMakeLists.txt

@@ -1,3 +1,5 @@
+cmake_minimum_required(VERSION 3.20)
+
 project(System.Security.Cryptography.Native C)
 
 # These are happening inside of OpenSSL-defined macros out of our control